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Other
Soil Mechanics
Triaxial Test-IV
In a consolid...
Question
In a consolidated drained triaxial test a specimen of clay fails at a cell pressure of
60
k
N
/
m
2
. The effective shear strength parameters are C' =
15
k
N
/
m
2
and
ϕ
′
=
20
∘
. Find the compressive strength of the soil in
k
N
/
m
2
105.216
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Solution
The correct option is
A
105.216
Given,
¯
¯
¯
σ
3
=
60
k
N
/
m
2
c
′
=
15
k
N
/
m
2
ϕ
′
=
20
∘
We know that,
¯
¯
¯
σ
1
=
¯
¯
¯
σ
3
t
a
n
2
(
45
+
ϕ
′
2
)
+
2
c
′
t
a
n
(
45
+
ϕ
′
2
)
=
60
t
a
n
2
(
45
+
20
2
)
+
2
×
15
t
a
n
(
45
+
20
2
)
= 165.216
k
N
/
m
2
Compressive strength of soil
=
¯
¯
¯
σ
1
−
¯
¯
¯
σ
3
= 165.216 - 60
Compressive strength
=
105.216
k
N
/
m
2
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2
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